The Role of Hydrophobic Chains in Self-Assembly at Electrified Interfaces:  Observation of Potential-Induced Transformations of Two-Dimensional Crystals of Hexadecane by In-situ Scanning Tunneling Microscopy

2002 ◽  
Vol 106 (43) ◽  
pp. 11264-11271 ◽  
Author(s):  
Yufan He ◽  
Tao Ye ◽  
Eric Borguet
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Self Assembly ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Tunneling Microscopy ◽  
Electrified Interfaces

Potential- and concentration-dependent self-assembly structures at solid/liquid interfaces

Nanoscale ◽  
2018 ◽  
Vol 10 (7) ◽  
pp. 3438-3443 ◽  
Author(s):  
Zhen-Feng Cai ◽  
Hui-Juan Yan ◽  
Dong Wang ◽  
Li-Jun Wan
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Self Assembly ◽  
Scanning Tunneling ◽  
Liquid Interfaces ◽  
Tunneling Microscopy ◽  
Controlled Assembly ◽  
Electrochemical Scanning Tunneling Microscopy ◽  
Solid Liquid

We report the potential and concentration controlled assembly of an alkyl-substituted benzo[1,2-b:4,5-b′]dithiophene (DDBDT) on an Au(111) electrode byin situelectrochemical scanning tunneling microscopy (ECSTM).

IN-SITU HIGH-TEMPERATURE SCANNING-TUNNELING-MICROSCOPY STUDIES OF TWO-DIMENSIONAL ISLAND-DECAY KINETICS ON ATOMICALLY SMOOTH TiN(001)

2000 ◽  
Vol 07 (05n06) ◽  
pp. 589-593 ◽  
Author(s):  
S. KODAMBAKA ◽  
V. PETROVA ◽  
A. VAILIONIS ◽  
P. DESJARDINS ◽  
D. G. CAHILL ◽  
...  
Keyword(s):  
High Temperature ◽  
Scanning Tunneling Microscopy ◽  
Ostwald Ripening ◽  
Single Atom ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Decay Kinetics ◽  
Tunneling Microscopy ◽  
Temperature Scanning

In-situ high-temperature scanning tunneling microscopy was used to follow the coarsening (Ostwald ripening) and decay kinetics of single and multiple two-dimensional TiN islands on atomically flat TiN (001) terraces and in single-atom deep vacancy pits at temperatures of 750–950°C. The rate-limiting mechanism for island decay was found to be surface diffusion rather than adatom attachment/detachment at island edges. We have modeled island-decay kinetics based upon the Gibbs–Thomson and steady state diffusion equations to obtain a step-edge energy per unit length of 0.23±0.05 eV/Å and an activation energy for adatom formation and diffusion of 3.4±0.3 eV.

ON THE ROLE OF KINKS AND STRAIN IN HETEROEPITAXIAL GROWTH: AN STM STUDY

2000 ◽  
Vol 07 (05n06) ◽  
pp. 673-677
Author(s):  
E. LUNDGREN ◽  
M. SCHMID ◽  
G. LEONARDELLI ◽  
A. HAMMERSCHMID ◽  
B. STANKA ◽  
...  
Keyword(s):  
Diffusion Process ◽  
Scanning Tunneling Microscopy ◽  
Three Dimensional ◽  
Growth Mode ◽  
Scanning Tunneling ◽  
Two Dimensional ◽  
Heteroepitaxial Growth ◽  
Tunneling Microscopy ◽  
Exchange Diffusion

Interlayer diffusion of Co over steps of vacancy islands on the Pt(111) surface as studied by scanning tunneling microscopy is presented. It is demonstrated that Co atoms descend Pt steps by an exchange diffusion process at the step edge with the Pt atoms. Further, the exchange diffusion process is observed to occur at the corners (kinks) of the vacancy islands. The importance of kinks concerning whether the growth mode of a heteropitaxial film is two-dimensional or three-dimensional is demonstrated for the case of thin Co films on Pt(111). We argue that the strain in the Co film is to a large extent responsible for the kink formation.

scholarly journals Potential Driven Non-Reactive Phase Transitions of Ordered Porphyrin Molecules on Iodine-Modified Au(100): An Electrochemical Scanning Tunneling Microscopy (EC-STM) Study

Surfaces ◽  
2018 ◽  
Vol 1 (1) ◽  
pp. 12-28 ◽  
Author(s):  
Tomasz Kosmala ◽  
Matías Blanco ◽  
Gaetano Granozzi ◽  
Klaus Wandelt
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Long Range ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
The Self ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Electrode Potentials ◽  
Electrochemical Scanning Tunneling Microscopy

The modelling of long-range ordered nanostructures is still a major issue for the scientific community. In this work, the self-assembly of redox-active tetra(N-methyl-4-pyridyl)-porphyrin cations (H2TMPyP) on an iodine-modified Au(100) electrode surface has been studied by means of Cyclic Voltammetry (CV) and in-situ Electrochemical Scanning Tunneling Microscopy (EC-STM) with submolecular resolution. While the CV measurements enable conclusions about the charge state of the organic species, in particular, the potentio-dynamic in situ STM results provide new insights into the self-assembly phenomena at the solid-liquid interface. In this work, we concentrate on the regime of positive electrode potentials in which the adsorbed molecules are not reduced yet. In this potential regime, the spontaneous adsorption of the H2TMPyP molecules on the anion precovered surface yields the formation of up to five different potential-dependent long-range ordered porphyrin phases. Potentio-dynamic STM measurements, as a function of the applied electrode potential, show that the existing ordered phases are the result of a combination of van der Waals and electrostatic interactions.

Role of the Anion in the Underpotential Deposition of Cadmium on a Rh(111) Electrode:  Probed by Voltammetry and in Situ Scanning Tunneling Microscopy

2005 ◽  
Vol 109 (31) ◽  
pp. 14917-14924 ◽  
Author(s):  
Liang-Yueh Ou Yang ◽  
Fahd Bensliman ◽  
Chia-Haw Shue ◽  
Yaw-Chia Yang ◽  
Ze-Haw Zang ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Underpotential Deposition ◽  
Scanning Tunneling ◽  
Tunneling Microscopy
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